Turbomachinery Advisor with Petrobras E&P Business Unit, in Rio de Janeiro, Brazil. He has been in the oil and gas industry for 28 years. Mr. Miranda is responsible for the technical support to existing machinery operations, as well as for conceptual design, specification, selection, and shop test acceptance of turbomachinery. His background includes comprehensive evaluation of energy and compr...

Engineer of the Turbomachinery Laboratory at Mitsubishi Heavy Industries, Ltd., in Takasago, Japan. He has been involved in the design and development of turbomachinery compressors and expanders as well as combustors and chemical reactors. He is currently engaged in aerodynamic design and testing of special purpose turbomachinery. Mr. Yagi holds B.S. and M.S. degrees from the University of Toky...

With the demand for turbomachinery to operate at higher speeds, loads, and power, fluid film bearings that support turbomachinery must be capable of operating in these more demanding applications. Thrust bearings operating at high speeds and loads can experience high surface temperatures and thin fluid film thickness. Typically, babbitt (white metal) is the bearing lining material for most turb...

This paper describes the development of a computational method to solve the equations of fluid flow across a turbomachinery blade row. The work was done within the Numerical Propulsion System Simulation (NPSS) computational framework and results in a collection of objects which use an implicit formulation of the turbomachinery equations to solve for the fluid exit conditions across each blade r...

In today's CFD-assisted turbomachinery design, a primary objective is to minimize the effects of vortices. Their automatic identification, along with other flow structures, in numerical data is a current research topic. This paper presents a novel method to find vortex hulls in turbomachinery flows automatically. Based on a vortex core line that is the centerline of the vortex, the method is ab...

The role of multistage turbomachinery simulation in the development of propulsion system models is discussed. Particularly, the need for simulations with higher fidelity and faster turnaround time is highlighted. It is shown how such fast simulations can be used in engineering-oriented environments. The use of parallel processing to achieve the required turnaround times is discussed. Current wo...

An artificial dissipation scheme using the concepts of SLIP and CUSP is implemented on top of a baseline three-dimensional turbomachinery flow code. The original baseline code uses a finite-volume method for the Navier-Stokes equations with classical Jameson-Schmidt-Turkel(JST) scalar dissipation scheme. This paper focuses on the comparison of the performance of the CUSP scheme with the origina...

State of the art turbomachinery flow analysis codes are not capable of predicting the viscous flow features within turbomachinery blade wakes. Until efficient 3D viscous flow analysis codes become a reality there is therefore a need for models which can describe the generation and transport of blade wakes and the mixing process within the wake. To address the need for experimental data to suppo...